Chariklo is the largest confirmed centaur, a minor planet orbiting the Sun between Saturn and Uranus. In 2014, two rings were discovered around Chariklo. Soon after, scientists discovered that rings likely exist around another centaur, Chiron, but the origin of these rings remained a mystery — until now.
Over the last two decades, the discovery of hundreds of giant comets, termed Centaurs, on unstable orbits in the outer planetary system means that these objects pose a much greater hazard to life than asteroids, according to a team of UK astronomers. Centaurs are typically 50 to 100 kilometres across, or larger, and a single such body contains more mass than the entire population of Earth-crossing asteroids found to date.